Maximum pressure control valve



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o o o L J L 5 333 19 i yz z I 8 O O O w) l INVENTOR Edward fl.fwckwell pril 28, 195 E. ALROCKWELL 2,636,511

' MAXIMUM PRESSURE CONTROL VALVE Original Filed Ot. 2, I 2 SI-lEETS-SHEET 1 ATTORNEY p 1953 E. A. ROCKWELL MAXIMUM PRESSURE CONTROL VALVE Original Filed Oct. 2, 1943 2 SHEETS-SHEET 2 fimwmwwwwwmkinw WUHM Patented Apr. 28, 1953 UNITED STATES ATET OFFICE MAM PRESSURE CONTROL VALVE Edward A. Rockwell, Shaker Heights, Ohio, as-

signor to The New Britain Machine Company, New Britain, 001111,, a corporation of Connecticut 18 Claims.

My invention relates particularly to valves for the control or regulation of fluid pressures generally, but it has application particularly to the control of hydraulic pressures, as for instance pressures delivered from an accumulator.

The object of my invention is to provide a valve or valve means for controlling or regulating the supply of fluid pressures in an advantageous manner, although it has especial applicability for the delivery and maintenance of maximum hydraulic pressures. A further object of my invention is to provide a Valve mechanism in which there is a normally open valve in a hydraulic line supplied with fluid pressures, said valve being so constructed as to maintain the desired maximum range of pressures. A further object is to provide a check valve in a line supplied with a hydraulic pressure liquid which is adapted to close when the pressure falls below a given maximum. Still another object is to provide an effective means for constructing and assembling the valve mechanism by supporting the said valve between springs so as to retain the valve normally open due to the force of one of said springs. Again, a further object is to provide a ball check valve within a plunger valve, the latter being normally opened by a strong spring and the ball valve being normally seated by a small spring. A further objectis to provide means for assembling the ball valve and plunger valve, together with their operating springs as an assembly in a valve casing. Also, another object is to provide means for adjusting the force of the strong spring which normally maintains the plunger valve open. Further objects of my invention will appear from the detailed. description of the same hereinafter. This application is a division of my applicationupon Accumulating Apparatus, Serial No. 504,807, filed October 2, 1943, now Patent No. 2,404,095 issued July 16, 194,6, which application is a diviion of my application number 312,356 filed January 4, 1940, now PatentNo. 2,331,800, granted October 12, 1943, upon System for Controlling the Application of Power.

'While my invention iscapable of embodiment in many difierent forms, for the purpose of illustration I have shown only one form thereof in the accompanying drawings, in which- Fig. lis a diagrammatic elevationof the accu,

mulator shown as being associated with a supply reservoir, as well as with an intermittently'acting Y vided therein a reservoir gravity-feed tank I having a filler opening 2, an inlet 3 for the returned discharged liquid, which may be a hydraulic brake. fluid or any other suitable liquid, and a removable cylindrical screen filter 4 located over an outlet or supply opening 5 which leads by a pipe 0, having a branch inlet pipe 6a for returned discharged liquid, to a rotary pump 1 which may, for example, be any desired type of gear pump. This is driven by an electric motor 8.

Pressure liquid is thus supplied from the pump 1 by a pipe 9 to an inlet 10 on a pressure controller II. The pressure fluid from the pump 7 is thence received directly in a chamber I2 in a cylinder 13 so as to force to the left, in Figs. 2 and 3, a movable member or piston M which is mounted by means of a screw l5 on a plunger l6 between which piston l4 and plunger 16 there is a chevron packing ll, of suitable material. A snap ring stop ill for the plunger ['6 is located at the left of the cylinder 13, which latter is screw-threaded, and provided with a pair of ears l9 and 20, on the split end of said cylinder l3, secured together with a bolt 2! for screw-threaded attachment to a spring casing 22, so as to hold thev screw-threaded end of the cylinder I3 fixedly on the spring casing 22. Also above and opposite to the ears I!) and 20' there is a lug 2211 having a bolt 22b therein for supporting an end of the accumulator from the automobile chassis in any desired way. The said plunger it rests against the face of a spring retainer plate 23. The spring casing 22 also has a split ring stop 24 for the retainer plate 23, which is also provided with-an internal sleeve 25' to act as a guide for a plurality of Belleville spring washers 26 which are merely dished rings of spring steel. As shown in the drawings, the said rings 26 are located so that the adjacent rings have their dished portions extending in opposite directions, said rings being thus carried in an annular chamber 21 between the casing 22 and the guide 25 at intervals along the chamber 27. Between groups of the spring washers 25 there are ring-shaped blocks 28 to aid in maintaining the alignment of the spring washers 2B. The left end of the chamber zl is closed by a screw-threaded cap 29,

having adjacent to a split end of the cap 29 a pair'oi ears '30 and 3|, screw-threaded tothe spring casing 22 and. clamped together by abolt 32,'so as to holdthe cap 29 tightlyonthecylinder 3 22. Also,- above and opposite to'the ears-"30and 9| thereis alug- 32a having a bolt 32!) therein for supporting the end of the accumulator from the automobile chassis in any desired way. Bolted to the left face of the cap 29 there is a cylindrical switch housing 34, which extends inwardly within the washer 26, the same having a removable screw-plug 35 to permit access to the switch terminals for leads 3-6 and 31, lea'ding-tothe switch terminals. A cover plate 33 is bolted to the switch housing 34. In said 'c'o'ver plate 38 there is a sleeve 39 having a screw-threaded cap'49 to hold in place a sleeve 4lfwhioh-has a screw 42 adapted to be received ina slot 43 in thesleeve 39. adjustable switch supporting'r'od44' provided with a screw-threaded hole 45 to aid in the removal thereof. Slidably mounted on the rod -'44-there is a copper plate 46 which- -operates as a starting switch in the initial starting or setting of the switch apparatus, said plate 46 being normally held in its farthest position 'to'the left by alight spring 47. The other end of-said spring 41 abuts against a nut 48 on a sleeve' 49 carried on the rod 44-, said nut 48 having a washer 50 spacing it from an insulated-ring carried on the sleeve 49 and which supports two rod-shaped terminals 52 and 53 connected to said leads- 3! and 3 5 respectively. -The copper 'pla'te'46 is designed to initially close the circuit manually between the said two rods 52 and-'33. The right-hand end of the rods-52 and53 have screw-threaded thereto conducting plates 54 and 55 'which are designed, in the automatic operation of the apparatus, to close the circuit with a copper disk 56 carried on a circuit-breaker sleeve 51 slidable within the sleeve-49 and normally held towards the right in Figs. 2'- and 3- by a-spring 58'to'close'the said circuit. It will -be-noted that the lead 36 is connected' to one terminal 59 atone side of the motor '8 and the other lead 31 leads-to any suitable source' of electricaL-energy; as, for example, a battery, not shown,--which-latter is also connected by a lead 69 to a terminal 6! on said motor. Theright-hand'end of the rod 44 has a stop 62 cooperating with the interior-of a shell 63 which is formed on-the end of'the circuit breaker sleeve '51. "This shell 63 is adapted to be moved for the automatic makingand-breaking of the pumping circuit by a'ring 64' mounted on acylindrical member 65 carrying within the-same asnap actioncircuit breaking member 56,-the irmer' left portion of which rests against aspringhousing 61, having aspringta within the same carried onthe outside ofa sleeve 89 which overlies a rod 19, having a headed-screw 1| and a-washer l I a supporting near one end thereof a a washer 12' held in place by a snap ring12ato-retain said spring 68 in place.

' The said s'napaction-circuit breaking member 86 cooperates with twobell-c-rank levers i3 and 14 having rollers and 16 thereon, which latter are forced against the face of the cylindrical member'65 by springs 11, resting against-extensions ill on armsof the-bell-crank levers J3 and I4 which are carried by means of pivotstn. The arms'19 form a part-of the switch housing 34. The rod-l9, after passing through the snap action memberGS; atthe'right' thereof, carries a spring sleeve =8l'having'therein a spring "82 supported on a sleeve'member -83 around the rod--10,- which latter has a shoulder supporting-an end washer 85' to act as a retainer for said spring-82. The right-hand end of the rod 10 has a screw-thread 8B which is secured within the spring retainer Said screw 42 also fastens inposition anplate 23-by'*means of nuts 81. *Notchestt in the face of the cylindrical member 65 also cooperate with said rollers 15 and E6 so as to retain the "pump circuit broken when the pressure-liquid line is broken, that--is to say when the piston 14 is at the extreme right-hand end of the cylinder 53. These notches'88 can thus come into action "to'insure maintaining the pump circuit open when the movable member or piston 14 has moved to its extreme forward position to the right of Fig. 3. However, when the said liquid line is complete and the pump motor has been started manuallyby moving the copper plate 46 to the -right,- the pump will be started to supply the 1 pressure liquid ther efrom to the cylinder (2 and the piston 14 will move to the left, accordingly,

until the snap action circuit breaker 66 breaks the circuit when the desired pressure has been accumulated, so that, thus, liquid is supplied from the cylinder 12 through a port 89 and thence through radial ports 99 in a check valve sleeve 9! which-is normally kept 'in'elevated position by means of a spring92 carried in a cage 93 screwthread'ed into the end of the cylinder l3. The lower end of the cage 93 has a slotted opening 94 to permit removal thereof, the same "being covered with a screw-threaded apertured dust cap 95. Above the cage 93there is a screw sleeve 95a, the adjusted position of the sleeve'being maintained by a screw 96 cooperating with a series of slots 9'! in said sleeve. This adjustment of the sleeve 95a also permits the'tightening of an annular seal 98 located above a washer 99, the seal 98 being supportedon the other face thereof by a spacing member H10 which rests against an apertur'ed'sleevel'ili within whichthe valve member 9! slides. A check" valve 192 is carried'within the sleeve member 9| and is held on its seat by a spring I93. The pressure liquid which is thus supplied by the force from the piston 14 is discharged past the check valve I02 and thence to a discharge port 104 leading to a pipe H15, this discharged pressure being a uniform'pressure, preferably of about 500 lbs, per square inch. Another discharge pipe Hit conveys the pressure liquid at this same pressure from the discharge port 184 to any desired part to be moved; of an automobile or any other apparatus.

Inthe operation of the controlling mechanism, it will be understood that the same is supplied frornthe supply reservoir I which conveys the liquid by the pipe 6 to the rotary pump 1, driven by the elcctricmotor 8. 'The liquid, placed under' pressure by the pump I, is delivered by the pipe 9 to the inlet ll! of the controller ll so" that any desired pressure is maintained thereby. Preferably, however, the controller is soconstructed as to maintain a pressure, for example, ofapproximately 1000 lbs. per square inch. The liquid, under pressure, received in the inlet ID from the pump I forces the piston I4 to the left, in Figs. 2 and 3, so as to place the spring washers 26 under compression. This continues until the circuit breaking member 66 passes beneath the rollers 15 and I6 so as to cause the cylindrical member 65 to move suddenly towards the left, thus causing the circuit breaker sleeve 51 to break the contact between the copper disk 56 and the conducting plates 54 and 55, so as to stop the motor 8 and the pump 1. This condition of the circuit, including the wires 36, 31, 59, 60 and 6!, will continue until suflicient liquid has passed from the controller through the passageway 89, pastthe checkvalve I02 until the circuit breaking member 66 has been moved suddenly-to the right-hand side of the r'ollers'l5 and "so as to permit the spring 58 to again-complete the motor circuit between the copper disk 56 and the conducting plates 54 and 55, whereupon the'pump 1 will again charge the controller. In this way a constant pressure is maintained in the controller H, irrespective of the extent of withdrawal 5 of the liquid therefrom through the passageway 89. Inthe initial starting of the controller'it will be understood that the copper plate 46 is arranged to be moved manually in opposition to the spring 41 in order to complete the circuit between the two rods 52 and 53. -It

will be understood, also, that the liquid which 1. In combination, an inlet for fluid under pressure, an outletfor the delivery of the pressure fluid, said outlet having a spring-pressed valve therein provided with a spring normally holding the valve open by. spring pressure urging the valve in a direction against back pressure in said outlet, and a check valve, seating in the same direction as said spring-pressed valve, and closedby the back pressure from said outlet to prevent -back flow from said outlet, said check .valve being located within said springpressed valve.

2. In combination, an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a spring-pressed valve, therein provided with a spring normally holding the .valve open by spring pressure urging the valve in a direction against said back pressure in said .outlet and said valve having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located within said spring-pressed valve.

3. In combination, an inlet for fluid under pressure, an outletfor the delivery of themessure fluid, said outlet having a spring-pressed valvegtherein provided with a springnormally holding the valve open by spring pressure urg ing the valve in a direction against back pres sure in said outlet and said valve having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located within said ing the valve in a direction against back presg sure from said outlet, said valve being providedwith a plunger with a spring and a check valve, seating in the same direction as said springpressed valve, and closed by said last mentioned spring and by the back pressure from saidrout let' to'prevent'backfflow from said outlet, said check valve beinglocated within said spring-5.

pressed valve.

5. In combination, an inlet ."for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a spring-pressed valve therein provided with a spring normally holding the valve open by spring pressure urging the valve'in a direction against back pressure from said outlet, saidvalve being provided with a plungerwith a spring and having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is 'locatedto prevent back flow from said outlet, said'check valve being located within said spring-pressed valve.

6. In combination," an inlet for fluid under pressure,'an outlet for the delivery of the pressure fluid, said outlet having a spring-pressed valve therein provided with a spring normally holding the valve open by spring pressure urging the valve in a direction against back pressure from said outlet, said valve being provided with a plunger with a spring and having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located within said spring-pressed valve, the said spring-pressed valve being in the form of a sleeve carrying therein a valve seat and a spring for forcing the check valve on the valve seat.

7. In combination, an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a spring-pressed:

valve therein provided with a spring normally holding the valve open by spring pressure urging the valve in a direction against back pressure from said outlet, said valve being provided with a plunger in an adjustable seal and a spring with a check valve, seating in the same direction as said spring-pressed valve, and closed by the back pressure from said outlet to preventback flow from said outlet, said check valve being located within said spring-pressed valve.

8. In combination, an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a spring-pressed" valve therein provided with a spring normally holding the valve open by spring pressure urging the valve in a direction against back pres-' sure from said outlet, said valve being provided with a plunger in an adjustable seal and a spring with a check valve, seating in the same direc-: tion as said spring-pressed valve, and closed by the back pressure from said outlet to prevent back flow from said outlet, said check valve being'located within said spring-pressed valve, said spring-pressed valve having therein the check valve between which check valve and said inlet said spring-pressed valve is located.

9; In combination, an inlet for fluidunder' pressure, an outlet for the delivery of the pres-- sure fluid, saidoutlet having 'a'spring-pressedvalve therein provided with a spring normally holding 'the valve open by spring pressure urging the valve in a direction against back pressure-from said outlet, said valve being provided with a plunger in an adjustable seal and a spring, said plunger havingftl rerein also a check valve; seating in the" same directionas said spring pressed valve, and-between which check valve andsaid-inlet said-rspring pressedmvalve is 10- catedto prevent. back flow .from said outlet, said check valve beingllocatedwithin said 'springpressed valve, the said plunger being in the form of animperforate sleeve carrying therein a valve seat and the spring for forcing the check valve on the valve seat.

10. In combination, an inlet for. fluid under pressure, an outlet-for the delivery of the pressure fluid, said outlet having a. conical springpressed valve provided with an adjustable spring normally-holding the valve open by spring pressure urging the valve in the direction against the back pressure which seats the valve and a check valve, seating in the: same direction as saidspring-pressed valve, and closed by backpressure from said outlet to.prevent back flow from said outlet, said check valve being located within said spring-pressed valve.

11. In combination, an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a conical springpressed valve provided with an adjustable spring normally holding the valve open by spring pressureurging the valve in the'directionagainst the back pressure which seats the valve and said valve having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located within said spring-pressed valve.

12. In combination, an inlet for fluid under pressure, an outlet for thedelivery of the pressure fluid, said outlet having a conical springpressed valve provided with an adjustable spring normally holdingthe valve open by spring pressure urging the valve in the direction against the back pressure which seats the valve and said valve having therein also a check'valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located Within said spring-pressed valve, the said spring-pressed valve being in the form of an imperforate sleeve carrying therein a valve seatand a spring for forcing the check valve on the valve seat.

13; A valve casing having therein an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a conical spring-pressed valve provided with an adjustable spring normally holding the valveopen by spring pressure urging the valve in the direction against the back pressure which seats the valve, a check valve, seating in the same direction as said spring-pressed valve, and closed by the back pressure from said outlet to prevent back flow from said outlet, said check valve being located within said spring-pressed valve and a perforated inlet sleeve aroundthe conical valve.

14. A valve casing having therein an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a conical spring-pressed valve provided with an adjustable spring normally holding the valve open by spring pressure urging the valve in the direction against the'back pressure which seats the valve, said valve having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent backflow from saidoutlet, said check valve beinglocated within saidspringepressed valve and a perforated-'inlet'sleeve around the conical-valve.

- '15. A valve casing having therein aninlet-for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a conical spring-pressed valve provided with an adjustable spring normally-holding the valve open by spring pressureurglng the valve in the direction against the back pressure which seats the valve and said valve having therein also a check valve, seating in the same direction as said springpressed valve, and between which check valve and said inlet said spring-pressed valve isle-- cated to prevent back flow from said outlet, saidcheck valve being located within said springpressed valve, the said spring-pressed valve being in the form of an imperforate sleeve carrying therein a valve seat, a spring for forcing the checkvalve on the valve seat, and a perforated inlet sleeve around the conical valve.

' 16. A valve casing having therein an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a-conical spring-pressed valve provided with an adjustable spring normally holding the valveopen by spring pressure urging the valve in the direction against the back pressure which seats the valve and a check valve, seating in the same di-.

rection as said spring-pressed valve, and closed by back pressure from said outlet to prevent back flow from said outlet, said check valve being located within said spring-pressed valve, an end closure in which the outlet is carried, and a perforated inlet sleeve around the conical valve supported between the first mentioned valve and the inlet.

1'7. A valve casing having therein an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having a conical spring-pressed valve provided with an adjustable spring normally holding the valve open by spring pressure urging the valve in the direction against the back pressure which seats the valve and said valve having therein also a check valve, seating in the same direction as said spring-pressed valve, and between which checkv valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, saidcheck valve being located within said springpressed valve, an end closure in which the outlet is carried, and a perforated inlet sleeve around the conical valve supported between the first mentioned valve and the inlet.

18. A valve casing having therein an inlet for fluid under pressure, an outlet for the delivery of the pressure fluid, said outlet having. a conical spring-pressed valve provided with an adjustable spring normally holding the valve open by spring pressure urging the valve in the direction against the back pressure which seats the valve and said valve having therein also a check valve, seating in the same direction as said springpressed valve, and between which check valve and said inlet said spring-pressed valve is located to prevent back flow from said outlet, said check valve being located within said springpressed valve, the said spring-pressed valve being in the form of a sleeve carrying therein a valve seat, a spring for forcing the check valve on the valve seat, an end closure in which the outlet is carried, and a perforated inlet sleeve around the conical valve supported between the first mentioned valve and the inlet.

I EDWARD A. ROCKWELL.

, l i sr mes 4 l wi r s References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Vielhaber Mar. 11, 1890 6 Vielhaber Mar. 11, 1890 Taefel Oct. 23, 1894 DeLong Oct. 8, 1895 Wainright July 19, 1910 Number 10 Name Date Dieter Mar. 9, 1915 Albrecht July 12, 1927 Cannon Jan. 16, 1940 Livers May 28, 1946 Sacchini July 30, 1946 Majneri Apr. 18, 1950 Cannon et a1 Oct. 17, 1950 

